Improved capstan-windlass



UNTTED STATES PATENT OFFICE',

Z. E. COFFIN, OF NEWTON, MASSACHUSETTS.

,- IMPROVED CAPSTAN-WINDLASS.

`rSpecification forming part of Letters Patent No. 58,069, dated September 18, 1866.

To all whom t may concern:

Beit known that I, Z. E. COFFIN, of Newton, in the county of Middlesex and State of Massachusetts, have invented a new and useful Improvement in Capstau-Wiudlasses; and I do hereby declare that the following is a full and exact description thereof, reference being had to the accompanying drawings, which form a part of this specification, and to the letters of reference marked thereon.

With reference to the drawings, Figure lis a sectional perspective illustration of my iinprovement. Fig. 2 is a sectional view, showing the rollers which supportthe windlassbarrels and their shafts.

Like letters refer to the same or likeparts in all the figures.

a is the capstan-barrel. and c the lever-head. A central vertical shaft, d, has its bearing in the baseplate b, and 011 this shaft is keyed a plate, e, upon which are arranged the selfacting bolts or pawls f, which catch in the ratchet-teeth g on the bedplate. On this shaft d is also keyed the plate h. This plate carries studs 1'-, on which are arb is the base-plate,

'ranged the gear-wheels j. These gear-wheels play into the internal gear k in the capstanbarrel, and also into a central pinion, l, which isfast tothe lever-head, and with it turns freely, as does also the capstan-barrel upon the central shaft, d.

In the lever-head lare a set of self-actin pawls or bolts, m, playing into ratchet-teeth on the top of the capstan-ba-rrel,and provision is made, by ring a and a series of inclnes or other means, for liftingthese pawls or bolts, so as to render them inoperative at pleasure. The barrel of the capstan has the usual pawls o, playing into pockets or ratchet-teeth in bedplate. Below, on the shaft d, is Xed a head or plate carrying the self-acting bolts or pawls p. These bolts or pawls can be lifted and rendered inoperative by means of ring q and its inclines, or other means. Then in action they catch and drive the bevel-gear wheel r, arranged to turn on the same shaft d. This bevel-wheel plays into and drives the bevelgear wheel s, and through it the windlassbarrels t u. These windlass-barrels are also mounted and turn freely upon the stationary shaft o. This shaft t" is keyed firmly in its bearings, and remains tiXed without rotation. The two barrels t n have an intermediate neck or barrel, w, which bears against two or more rollers, y, for the purpose ot' deriving support additional to that furnished by shaft QJ, the shaft and windlass-barrel being together supported thereby in the direction of the stra-in to which they are subjected by the action of the chain or cable.

The operation is substantially as follows: The simple capstan power being required, the pawls or bolts p are lifted, so disconnecting the windlass below from the capstan above. The levers now being putin action, the capstan-head is driven, and, by bolts or pawlsm, drives the barrel a, the shaft d rotating with it. The multiplied capstan power being required, the lever-head is rotated in the opposite direction, when the center gear, Z, drives gears j, and they, in turndrive the internal gear, k, and the capstan-barrel a; The bolts or paw/lsf, catching the ratchet-teeth g, hold the shaftd and stud-plate h from turning.

Then the windt-ass is to be used with simplc power the pawls or bolts p are let into action, and the capstan operated in the same manner and direction as described for simple capstan power. lhenthe multiplied capstan power is required to be applied to the windlass below, the lever-head is rotated in the same direction, thc bolts or pawls m first being thrown out of action, when the capstanbarrel a becomes stationary bythe action of pawls o, the internal gea-r, k, becoming thereby a fulcrum-gear, and the center gear, l, acting on gears j, drives their studs t', plate h, and shaft d, and, through gears r s, the windlass-barrels.

The chain-barrels a' .r may be connected to and driven, respectively, by the barrels t u at pleasure.

A frictioirband, z, with suitable lever, Ste., is provided, by mea-ns of which the anchor may be let go, and the windlass-barrels be allowed only to rotate slowly and safely, to lower away gradually, at pleasure. Thus,

Having described my improvement, what I claim as my invention, and desire to secure by Letters Patent, is as follows :y

l'. The employment of the capsa-n a and its system of gears j lc l, in combination with gears fr s and the Wincllass-barrels t u, substantially in the manner and for the purpose set forth.

2. The arrangement of the barrels t u .1; x,

and the gear s, to turn upon the shafto, this shaft being n Xed one and not allowed to rotate, Substantially as described.

3. The two or more rollers y, in combination with and to support the. Windlass-ba-rrels and shaftt u and fu, substantially as described.

Z. E. GOFFIN.

Witnesses J. B. THORNTON, CEPHAS BMG-11AM. 

